Countywide Vertical Datum Conversion Factors in Illinois

Illinois State Water Survey

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https://hdl.handle.net/2142/100387 Copy

Description

Title

Countywide Vertical Datum Conversion Factors in Illinois

Author(s)

Illinois State Water Survey

Contributor(s)

• Graff, Phillip
• Li, Jane

Issue Date

2007

Keyword(s)

• vertical datum
• conversion factors
• Illinois

Geographic Coverage

Illinois

Abstract

"Countywide Vertical Datum Conversion Factors in Illinois - This map displays countywide, conversion values to adjust elevations from the National Geodetic Vertical Datum 1929 (NGVD 29) to the North American Vertical Datum 1988 (NAVD 88). Values indicated should be added to current NGVD 29 elevations (not displayed) to obtain the NAVD 88 elevation. Countywide values were calculated using the methodology outlined in the Federal Emergency Management Agency (FEMA) Guidelines and Specifications for Flood Hazard Mapping Partners Appendix B. Point conversion factors were computed using the CORPSCON utility. This map is available online as a 11"" x 17"" PDF file (450k)."

Series/Report Name or Number

ISWS Map Series MS2007-01

Type of Resource

image

Language

en

Permalink

http://hdl.handle.net/2142/100387

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